Unexplained CPU/DRAM Base frequency change in BIOS causing divide error.
Posted on 2003-11-12
We have MS-DOS 6.22 running a proprietary software program on a Pentium 166 MHz card slot main board on an ISA Bus back plane. For it to run, the "CPU/DRAM base frequency" section of the BIOS must be set to "66/66MHz".
What can cause that to change back to the default "H/W Trap" with no other changes to the BIOS. We have ruled out user interface.